code: def test_get(self):
      with self._exp() as exp:
          var = Datetime(exp, self._random_path())
          now = datetime.now()
          now = now.replace(
              microsecond=int(now.microsecond / 1000) * 1000
          )
          var.assign(now)
          self.assertEqual(now, var.fetch())
  
file_path: neptune-client/tests/unit/neptune/new/attributes/atoms/test_datetime.py
imports: from datetime import datetime
  from mock import MagicMock, patch
  from neptune.attributes.atoms.datetime import Datetime, DatetimeVal
  from neptune.internal.operation import AssignDatetime
  from tests.unit.neptune.new.attributes.test_attribute_base import TestAttributeBase
label_desc: Use image node_id 3 for calling the TestDatetime obj's underlying member method code with example usage: obj.test_get() without return types